Advanced Analysis of Self-Potential Data in Ore Deposits of the South Caucasus

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Abstract

Self-potential (SP) method is one of the most non-expensive and unsophisticated geophysical methods. However, its application limits the absence of reliable interpreting methodology, first for the complex geological-environmental conditions. The typical disturbances appearing in the SP method and ways for their removal (elimination) are discussed. Some brief review of the available interpretation methods indicates their insufficient effectiveness, especially for complex environments. For the magnetic method of geophysical prospecting have been recently developed special quantitative procedures applicable under complicated environments (oblique polarization, rugged relief, and unknown level of the normal field). The performed analysis allowed to revealing some essential common peculiarities of magnetic and SP fields. These common aspects make it possible to apply the procedures developed in magnetic prospecting to the SP method. Besides the reliable determination of the depth of the anomalous target, these methodologies enable the introduction of corrections for the polarization effect and non-horizontal SP observations. For classification of SP anomalies is supposed to employ a new parameter - 'self-potential moment'. These procedures (improved modifications of characteristic point and tangent techniques) have been successfully tested both on SP models and in real situations in ore deposits in Turkey and Russia. Finally, interpretation procedures have been effectively applied at several ore deposits in the South Caucasus (Filizchai and Katsdag in Azerbaijan, and Uchambo in Georgia). The effectiveness of the multimodel approach with the application of gravity, magnetic, and SP methods is demonstrated on the generalized physical-geological model of the ore body of the Filizchai type. The obtained results indicate the high practical importance of the developed methodology.
Original languageEnglish
Pages (from-to)21-35
Number of pages15
JournalANAS Transactions, Earth Sciences
Volume2019
Issue number2
DOIs
StatePublished - 2 Dec 2019

Keywords

  • Self-potential moment
  • Disturbances
  • Quantitative analysis
  • Complex physical–geological environments

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